Question

please solve if you don't know then don't give answer , hey gourav give me answer ​

Answer 1

Step-by-step explanation:

1

$(3a + 4b) {}^{2}$

$(3a) {}^{2} + 2 \times 3a \times 4b + (4b) {}^{2}$

$9a {}^{2} + 24ab + 16b {}^{2}$

2

$(3x - 2y) {}^{2}$

$(3x) {}^{2} - 2 \times 3x \times 2y + (2y) {}^{2}$

$9x {}^{2} - 12xy + 4y {}^{2}$

3

$(x - \sqrt{3y} ) {}^{2}$

${x}^{2} - 2x \sqrt{3y} + \sqrt{3y} {}^{2}$

${x}^{2} - 2x \sqrt{3y} + 3y$

4

$(2x + \frac{1}{x} ) {}^{2}$

$( \frac{2x {}^{2} + 1 }{x} ) {}^{2}$

$( \frac{2x {}^{2} + 1) {}^{2} }{ {x}^{2} }$

$\frac{ {4x}^{2} + {4x}^{2} + 1 }{ {x}^{2} }$

5

$( \frac{a}{2} - \frac{b}{5} ) {}^{2}$

$\frac{ {a}^{2} }{4} - \frac{2ab}{10} + \frac{b {}^{2} }{25}$

$\frac{a {}^{2} }{4} - \frac{ab}{5} + \frac{b {}^{2} }{25}$

6

$(a + 0.1)(a - 0.1)$

$a {}^{2} - 0.1 {}^{2}$

$a {}^{2} - ( \frac{1}{10} ) {}^{2}$

${a}^{2} - \frac{1}{100}$

7

$103\times 105$

$10815$

Marked me as brainly

Answer 2

Step-by-step explanation:

i hope it's helpfull for u

last question me mane formula bata diya h